Apr 25, 2022 · Product Description. Marine Board HDPE (High Density Polyethylene) Plastic Sheet 1/2" x 24" x 48" White lor Textured. High density polyethylene (HDPE) is used in a variety of applications and industries where excellent impact resistance, high tensile strength, low moisture HENAN OKAYorption and chemical- and rrosion-resistance properties are required.